Water-tube boiler



7 9- o. GIANNELLI Q I 1 .WATER TUBE BOILER Fiiedbec. 17, 1924 2 Sheets-Sheet 1 III] lnrentor: F19. 4 E acmzzz;

May 14, 1929.

-O. GIANNELLI WATER TUBE BOILER Filed Dec. 17, 1924 2 Sheets-Sheet 2 Patented May 14, 1929.

ODOARDO GIANNELL'I, or EMPOLI, ITALY.

WATER-TUBE BOILER.

Application filed December 17, 1924, Serial No. 756,561, and in Italy January 2, 1924.

This invention relates to water tube boilers and is an improvement on the usual boilers of this kind, the boiler having but one nest of tubes,-aif0-rding a remarkable capacity for rapid evaporation and permitting the boiler of being given a greater length when compared with the boilers made in the past, in order to economize in room and weight, such improved boilers being specially suitable and convenient for use on war ships.

Another advantage of the boiler according to this invention is that the shipbuilder may build the boiler 01 more appropriate length according to the kind and size of the ship to be designed and to the space available.

The boiler is represented an example in the accompanying drawing, in which:

Fig. 1 is a vertical cross sectional View of the boiler of which Fig. 2 is a side view, partly sectional and Figs. 3 and l are diagrammatic plan views of an arrangement of boilers and engines on a war ship.

Figs. 5 and 6 are respectively transverse and fragmentary longitudinal sectional views on an enlarged scale showing a screen.

The boiler according to the invention is made to burn liquid fuel.

The boiler has two headers one of which 13 is placed in the lower part of the boiler and contains but water the other one A being placed in the upper part of same boiler and contains water and steam, such headers bei connected to one another by a single no. oi? water tubes C, which are only partially represented in Fig. 2 for sake of simplicity.

1n the boiler according to the invention the injection of the liquid fuel takes place chamber, with the result of a greater efii ciency and a greater production of steam.

The water is fed in the upper header and the stream of water is directed into the last rows of tubes by means of a suitable screen S that deflects its course so that the water is forced to go downwards into the outer range of tubes, where the gases of combustion arrive at the lowest temperature, reaching in this way the best conditions for the utilization of the heat.

The boiler according to this invention has also the advantage that it allows of a most advantageous alternate arrangement of boilers E and engines D, as shown inFigures 3 and l, specially adapted for light war ships, which afford the shipbuilder a complete liberty of establishing. the length and power of each boiler according to the room at hand, Figures 3 and 4 referring more specially to an installation on board of a cruiser or a destroyer.

But it must be understood that the arrangement o1 boilers and engines may be made in any other -way different from the one represented and described.

Having declared and ascertained the nature of my invention and in what manner it must be performed I now declare that what I claim is:

A water tube boiler including a combustion chamber, headers arranged on opposite sides of the combustion chamber, one of which is arranged higher than the other, a single nest of tubes connecting said headers and arranged diagonally across the combustion chamber, means for injecting liquid fuel at an angle from the top of said chamber and parallel to the lower sides of said tubes, means for feeding water to the upper header, and a screen arranged for deflecting a stream towards the outer row of tubes where the heat is at the lowest temperature, and the bottom of the combustion chamber being arranged so that hot gases are deflected thereby to pass obliquelyacross the said tubes, substantially as and for the purposes set forth.

In testimony whereof I have signed my name to this specification.

ODOARDO GIANNELLI. I 

